Physical & aggregate · 2025
Alkalinity in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2025 report shows Alkalinity detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Source water | 50.733333333333334 MG/L | None set |
Highest single sample Entry point | 76.1 MG/L | None set |
Average Entry point | 43.28 MG/L | None set |
Highest single sample Source water | 117 MG/L | None set |
Verbatim from Contra Costa Water District, CA's 2025 Consumer Confidence Report — source document ↗
About Alkalinity
A measure of the water's capacity to neutralize acids.
Not federally regulated for health; relevant to corrosion control and treatment.
How Contra Costa Water District, CA compares
Nearby systems also reporting Alkalinity:
People also ask
+Is there Alkalinity in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2025 Consumer Confidence Report lists Alkalinity at 50.733333333333334 MG/L. Contra Costa Water District, CA's 2025 report shows Alkalinity detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Alkalinity in drinking water?
The EPA has not set an enforceable federal limit for Alkalinity. Utilities still report any measured levels in their annual Consumer Confidence Report.
+What is Alkalinity?
A measure of the water's capacity to neutralize acids. Not federally regulated for health; relevant to corrosion control and treatment.
+Where does this Alkalinity measurement come from?
This page reproduces the Alkalinity entry from the 2025 Consumer Confidence Report published by the Contra Costa Water District, CA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/ca/contra-costa-water-district/2025/source.